package state;

// 测试观察线程状态变化
public class TestWatchStatus {
    public static void main(String[] args) throws InterruptedException {
        Thread thread =new Thread(()->{
            for (int i = 0; i < 5; i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.println("/////////");
        });


        Thread.State state = thread.getState();
        // 观察状态
        System.out.println(state);//NEW

        // 观察启动后
        thread.start();
        state = thread.getState();
        System.out.println(state);//RUNNABLE

        // 观察终止后
        while (state != Thread.State.TERMINATED){//只要线程不终止，就一直输出状态
            Thread.sleep(100);
            state = thread.getState();//更新线程状态
            System.out.println(state);//输出状态     TIMED_WAITING 等待   TERMINATED 终止
        }

        // 终止的线程不能再重新启动
        thread.start();
        state = thread.getState();
        System.out.println(state);//.IllegalThreadStateException  非法线程状态异常
    }

}
